Dance Marathons (also called Walkathons), an American phenomenon of the 1920s and 1930s, were human endurance contests in which couples danced almost non-stop for hundreds of hours (as long as a month or two), competing for prize money.
Frankie Laine the American singer who I saw many moons ago in the fifties once held the record for this type of dancing 3501 hours 145 consecutive days.In Atlantic City N J .did not do him any harm though he still alive and kicking age 93 this year